Roof chimney leak repair.
Vinyl siding chimney flashing.
Add felt if needed before nailing the new wood on and prime the new wood on all four sides before installing it.
Gable ends are their own can of worms as reguards uphill chimney flashings.
Leave a 1 4 inch gap between the step flashing and wood siding or cement board.
On a vinyl job moisture gains access to the back side of the vinyl at all sorts of points.
Inspect the sidewall around and underneath the fascia and inside the house for signs of moisture damage and repair any rotted areas.
Then an ice water shield underlayment must be installed around the chimney.
Nail j channel for vinyl or metal siding onto the flashing.
Install the kickout flashing underneath the first shingle photo 1.
Wall flashing where siding meets a chimney originally posted by michael thomas.